Australian Biological Resources Study

Australian Faunal Directory


Regional Maps

Suborder RECTANGULINA Waters, 1887

Compiler and date details

July 2001 - Dr Philip Bock


The name Rectangulina is used here to replace the name Rectangulata. This distinctive suborder comprises the single family Lichenoporidae. It was first defined by Waters (1887) and its morphology was detailed by Borg (1926, 1944), who introduced the alternative name Calyptostega. The ancestrula develops a cone of gymnocystal skeleton bounding the growth zone which broadens, opens and recurves to cover its origin, forming a basal lamina with a peripheral growing edge. Calcification of zooids is entirely cryptocystal. Zooids bud and grow radially, in connate rows or quincuncial series; these diverge towards the colony rim leaving spaces between, termed alveoli, which may be subdivided by extrazooidal cryptocystal calcification, and in some genera entirely closed. The brood chamber commences as a modified zooid, the body wall of which breaks down, becoming confluent with extrazooidal space and forming a colonial brood chamber. This develops a texturally distinct roof, with a tubular or flared ooeciostome.


History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
25-Mar-2014 BRYOZOA Ehrenberg, 1831 25-Mar-2014 MODIFIED Dr Robin Wilson (NMV) Elizabeth Greaves (NMV)
12-Feb-2010 (import)